RESEARCH OF THE PROCESS OF NON-NEWTONIAN LIQUID PRESSURE FROM A GAS PIPELINE
DOI:
https://doi.org/10.31471/2304-7399-2025-21(79)-272-279Keywords:
non-newtonian fluid, equations of motion and continuity, velocity distribution, flows through the moving boundary, cleaning piston.Abstract
The process of cleaning main gas pipelines with cuff-type cleaning pistons from liquid accumulations, which are characterized by non-Newtonian properties, is considered. Based on analytical studies of the nature of the movement of a liquid accumulation under the action of a solid body (cleaning piston) moving at a constant speed, the nature of the distribution of linear velocities over the cross-sectional area of the pipeline and along the length of the moving liquid accumulation has been established. The dependences of the pressure distribution in the liquid phase environment have also been constructed. The obtained regularities of the distribution of linear velocities and pressure over the cross-sectional area of the pipeline and along the length of the moving liquid accumulation, together with the regularities of deformation of the sealing elements of the cleaning device, made it possible to construct a picture of the flow of the liquid phase through the moving boundary into the piston space, which leads to a deterioration in the efficiency of gas pipeline cleaning. The study was conducted to displace water and non-Newtonian fluid from the gas pipeline; Their results show a significant influence of the properties of the liquid accumulation on the magnitude of the flows through the moving boundary, which must be taken into account when planning the cleaning of gas pipelines.
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